On 2018-09-12 19:40, Lee Howard wrote:
On 09/11/2018 09:31 AM, Matt Hoppes wrote:
So don't CGNat? Buy IPv4 addresses at auction?
Buy IPv4 addresses until CGN is cheaper. If a customer has to call, and you have to assign an IPv4 address, you have to recover the cost of that call and address. While ((CostOfCall + CostOfAddress)*NumberOfCalls) > (CostOfAddress*NumberOfNewCustomers): BuyAddresses(NumberOfNewCustomers)
Meanwhile, deploy IPv6, and move toward IPv4aaS, probably 464xlat or MAP, but your religion may vary. That way your "CGN" is an IPv6-IPv4 translator, and that's easier than managing dual-stack.
At the very least, dual-stack your web sites now, so the rest of us can get to it without translation.
Just regarding ipv4 issue solution, this process can be somehow automated by detecting those who use opendns(by netflow, for example), to avoid "CostOfCall" part. Also, to avoid false claiming of nat pool, he can nat DNS requests for OpenDNS to different ip pool, that cannot be claimed.